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6. Cautions in Operation
For safe and trouble-free operation, please pay attentions for the following items in
operating pump.
6.1 Cautions in Operation
(1)
This pump is designed exclusively for vacuum pumping. So a backing pressure
of the pump is needed to keep lower than 30 kPa (Gauge pressure) by a
reasonable means.
(2)
Use the pump at an ambient temperature of 0°C to 40°C.
(3)
Do not use the pump to suck corrosive gas, organic solvent, liquids, or
condensable gas (water vapor, etc.).
(4)
Use the pump in an environment where it is not likely that dust, dirt, etc. are
admitted into the pump.
(5)
This pump is not designed as an explosion-proof. So do not use it in the vicinity
of inflammable solvent or the like, which can be very dangerous.
(6)
Start the pump with the suction side and exhaust side under atmospheric
pressure. Otherwise, it is not so easy to start the pump.
(7)
If the pump is stopped under reduced pressure and is started immediately after
that, the pump may not restart. To restart it, vent the pump to atmospheric
pressure.
If the pump is used for other applications, consult with us.
6.2 Startup in Cold Season
In a cold season, it may sometimes be difficult to start the pump due to hardened
bearing grease, diaphragm or others. In that event, proceed as follows.
(1)
Vent the suction port to atmospheric pressure and turn ON/OFF the power
switch until the pump starts.
(2)
Operate the pump for several minutes with the suction port vented to
atmospheric pressure to warm up the pump.
(3)
Operate the pump as usual after the pump is warmed up.
6.3 Thermal Protector
(1)
This pump incorporates a manual reset type thermal protector. It automatically
cuts off the motor power circuit to prevent the motor from being damaged by
burning when the pump stops rotating due to trouble or when the pump is
energized with an over current due to overload during operation.
(2)
If the thermal protector is activated, turn OFF the power switch and contact our
representative or ULVAC KIKO. Never touch the motor, which is still very hot.
(3)
Restart operation after eliminating the cause of trouble and verifying that the
motor temperature has lowered.
